The number of insects in the world has plummeted, and Coleoptera account for 30 percent of them, not to because of urban development and the use of pesticides.The life of the stag beetle in the city is not far away from us, but their range of activities is less easily detected by humans. And Taiwan's stag beetle "Dorcus titanus sika" is more able to adapt to urban life, that if even they can not survive the environment, it will be the disaster of urban ecology.Cities should not be just human homes; Humans build cities, but not only humans live in this land, should hold the mentality of learning from nature.We should plan a symbiotic scheme suitable for each other through the survey of urban ecology and species habits, and reflect the purpose of symbiotic co-prosperity and sustainable environment of life. Campus is the habitat, is also our learning field, learning from nature, growing from the environment.